Electric heating unit



Nov. 30, 1948. s. J. TEMPLE ELECTRIC HEATING UNIT Filed March 22, 1947 S/DNEY J. TEMPLE,

IN V EN TOR.

ATTURNEK aicnted Nov. 30, 1948 v V UNITED STATES PATENT OFFICE- ELECTRIC HEATING UNIT Sidney Jf'lemple. Forest Hills, Pa., amignor to Edwin L. Wiegand Company, Pittsburgh, Pa., 1 corporation of Pennsylvania Application March 22. 1941, Serial No. lsasas 2' Claims. (Cl. 201-8'i) l 2 My invention relates to electric heating, and the by the sleeves 28 and cables ll substantially seal rincipai object of my invention is to provide a the apertures 27, and to the same purpose the ew-and improved electric heating unit. terminal portions ll of the element II are suit- In the drawings accompanying this specinca ably sealed to the caps 26 at the openings II, as

on and forming a part of this application I have ii by brazing, welding, or soldering. own for purposes of illustration one form which Further, with the element in the form herein invention may assume, designed particularly shown, with the two ends disposed in propinquity, or heating foundry sand, and in these drawings: the two terminal portions ll desirably are inter- Figure l is a plan view of this illustrative emconnected by a cross-brace 30 secured to the ter- Figure is a detail view illustrating the appliclelly r ng foundry s and P r y ation of the cross-brace extending betwe n th by reason of the protection afforded by the metal nds oi'the elem nt, sheath, including against abrasion by the sand,

Referring to the drawings, the illustrated emand the Portability d d y e flexi le c bles ion ll generally triangular in cross-section and brlcins between the rm nal Positions ll.

. t s embedded in suitably refrmtory is skilled in the art that my invention has other aplosetl in a generally triangular tubular sheath ll, 16 t s. e he in the specific embodiment I ow particularly in Figure 4, and having terherein shown and described, or with various modiinal portions ll substantially circular in crossncations which may be made-within the scope of ction and comprising resistor end portions ll y nvention, and according y 1!? will be underxtending substantially axially, as shown particu. stood that the particular embodiment herein arly in Figure 5, and connected to stud terminals shown n s i d i i tr tiv on y. and that I! suitably insulated from the sheath it as by y invention not to e re rded as limited eans oi mica washers It held in position by nuts therete- 1 ll screw-threaded onto the stud terminals l1. her fo e I c im! In the present embodiment of my invention, All electric heating unit comprising a tubucrew-threaded onto the stud terminals II are as l r' l heating element pr vided at at least able terminals 20 swaged or otherwise suitably end w l r terminal, n i lated onnected to the ends of cables 2| serving to concable pr W a terminal detachably c011- ect the element ill to a suitable source of elec- M l d to 1 r tor t minal. an insulating ricity, and each of the terminal connections is sleeve surrounding said resistor terminal and said nclosed in ahousing 22. so cable terminal, and a plural-part separable As herein shown, each of the housings 22 comh usin comprising tubular y portion surrises a metal tube 23 provided with an insulating rounding said sleeve and having one end provided iner 24 abutting at one end the respective end of with an aperture for the passage of and closely e element sheath, the tube is is screw-threaded engaging the periphery of the respective end oit its ends for the reception 01' caps 25 and Il, the 4 said element and the other end provided with an ap I8 is apertured at 21 for the passage of a pert e r h D -sak n o ly 9 8 8 8 leeve ll surrounding the respective cable II and the P ph y of said cable. rcvided to prevent too sharp bending of the cable 2. An electric heating unit comprising a tubul, and the cap 28 is apertured at 2! for the pass, lar electric heating element having its two ends ge of the respective terminal portion I I of the disposed adjacent each other and each provided lement l0. with a resistor terminal, a pair of insulated cables In the illustrated embodiment of my invention each provided with a terminal and having said he apertures 21 in the caps II are formed to terminals respectively detachably connected to losely receive the sleeves 2|, and the sleeves 28 said resistor terminals, a pair of insulating sleeves re iormedto closely receive the cables lLwhereone surrounding one oi. said resistor terminals diment of my i t 10 minal portions in any suitable manner, as by I Figure 2 is a side elevation of the same, r w-ins, welding. or s lde ins. n serving to Figure 8 is an enlarged section taken on the line p is i y 0 the nit as a whole.

- of Figure 1, Accordingly it will be appreciated by those Figure 4 is an enlarged gectlbntgken on the flue skilled in the art that the illustrated embodiment of Figur 1, a d id of my invention provides a unit well suited espedim nt 1' my invention comprises a tubular 10 II, the effective enclosure of the terminals, and l ctric h ating element is having an activ the rigidity of the unit resulting from the crossomprising a generally triangularly helical re- However, likewise it will be appreciated by those I and the respective cable terminal and the other surrounding the other of said resistor termineis and the respective cable terminal, a pair of plural-part separable housings each comprising a tubular body portion surrounding the respective 5 said sleeve and having one end provided with an aperture for the passage of and closely engaging the periphery of the respective end or said element and the other end provided with en aperture for the passage or and. closely engaging the periphery ot the respective said cable, and brace means interconnecting the two ends of said eiement independent of said housings.

smrm J. TEMPLE.

REFERENCES The following reierences are of record in the flie of this patent:

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